Oven.



.T. M. ROBERTS.

ovm.

' PPLIUATION TILE!) un. no, 191s. 1,088,628. Patented Feb. 24, 1914.

` I? .4. 9 /6 /y/a/ 2 la 3 1/ /Y 7: I /2l I g 20 25 25 i Mv'vnl 114127265386 zz/e/ Z107' fior ncy PATENT OFFICE.

'JESSE M. aoBEJaTS, or Los ANGELES, carrronnm.

OVEN.

Specification of Letters Patent.

Patented Feb. 24, 1914.v

Application med January 2o, uns. serial No. 742,155.

To all whom t may concern:

Be it knownthat I, JESSE M. ROBERTS, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented cer-tain new and useful Improvements in Ovens; and I do'declare the following to be a full, clear, and exact description of the invention#` such aswill enable others sk illed in the art to which ,it appertains to make and use the same.

rlhis invention relates to improvements 1n ovens. p s

One object of the invention is to provide an oven having insulated wallsand a substantially air tight closure whereby heat will be retainedv in the oven for a considerable length of time after the heating medium has been removed or the heat turned 0E from the oven.

With thisobject in View, the invention consists ofl certain novel features of construction, and the combination and arrangement'. of partsas will be more fully described and claimed.

ln the accompanying drawings; Figure 1 I is a horizontal sectional viewofmy improved oven or cooker; Fig. 2 is a vertical `longitudinal sectional view thereof; Fig. 3

is a fro-nt view of the oven with parts broken away and in section; Fig. 4 is an enlarged horizontal sectional view through one edge o f the front end of the oven and the engaging edge of the main door; Fig. 5 is a perspective View ofthe oven showing the door thereof closed and fastened; Fig. 6 is a similar view showing the main door open and the fuel supply pipe connected with the oven.

-My improved oven may be of uany suitable size and shape and constructedV of any suitable material, and preferably'eonsists of an inner lining or walls 1 formed of aluminum and an outer casing or walls 2 which may be formed ofwood, metal or other suitable material and which, in the present instance, are shown as being for-med of sheet metal. rlhe outercasing 2v is considerably larger than the inner' lining or walls and thus forms la space between the inner and outer members of the oven. rlhe space between said members is packed with a suitable insulating material 3 which is preferably diatomaceous silica, commonly called Sil-o-cel which has been found by experience to be a suitable insulating or heat retaining medium. The front side of the inner lining or member of the oven is open and between the front edges of t-he inner lining'and outer wall edges are then bent outwardly to form flanges or tongues 6 which are forced into or engagedvv with' corresponding recesses or grooves in the outer edge of the frame 4. The outer edges ofthe inner lining or wall of the oven are bent outwardly at right angles over the outer side ofthe frame and then bent inwardly to form tongues or flanges 7 which are forced linto or engaged with grooves or recesses in the outer side of the frame 4 as is clearly shownin Fig. 4 of the drawings. t

The oven is provided with a main door 8 comprising a frame 9 of wood or other suitable material corresponding in shape to the frame 4 in the front end of the oven.` On

the inner side of the door frame 9 is formed a continuous bead or tongue 10 which is adaptedto be engaged with the recess 5 in the frame 4. The inner edges ofthe frame are rabbeted as shown at l1 andwith said rabbeted edge of the frame is engaged an-v inner linin or wall 12 which forms the inner side o the door. Secured to the outer edges of the door frame 9 is an outer sheet metal wall or covering 13 between which and the wall 12 is 'formed a space which is packed with insulating material 14 of the same character as that used in packing the walls of the oven. 'lhe edges of the inner wall of the door are secured to the frame St by screws 15 while the edges of theouter wall of the door are bent or foldedback and then bent inwardly to form a flange `or tongue 16 which is forced into the outer edge of the frame 9` ofthe door and said a series of longitudinal horizont-ally disposed cleats 19 with which are slidably engaged a series' of shelves 20 adapted to support the cook-ing utensils placed in the oven. In addition to the main door 8. a supplemental drop door 21 is provided to retain the heat in the oven while the oven is being heated. The door 2l is here shown and is preferably in the form of a fiat metal plate having on its upper edge an inwardly` turned or hook shaped supporting ange 22. When in operative position the door 21 is adapted to be dropped down in front of the open end of the oven and to extend downwardly over or beyond the front edge of the lowermost shelf of the oven, said shelf being disposed a short distance above the bottom of the oven as shown. When the door. 2l is in an operative position the hook shaped flange 22 on the upper edge thereof is adapted to engage or hook over a door supporting rod 23 which extends across the open front end of the oven a short distance below the top thereof as shown. When not in use the door 21 is swung outwardly at its lower end'and pushed inwardly to a horizontal position immediately below the top of the oven opening in which position the door is slidably supported by cleats 24 secured to the sides of the inner wall of the oven as shown. l

In the space between the lower shelf 20 and the bottom of the oven and adjacent to the side and end walls of said space are arranged re bricks 25 by means of which the lining or inner wall of the oven around this space is protected Jfrom the intense heat of the burner with which the oven is provided. If desired, suitable heat retaining'and radiating plates or bricks (not shown) may be provided fornse in the oven. Arranged in the bottom of the oven is a burner 2 6 having a central fuel passage 27.

Fuel is supplied to the burner by a flexible fuel supply pipe 33 to which is secured an air mixer 34 which is here shown and is preferably in the .form of a hollow body tapered from its outer toward its inner end and which is open at its inner end. In connecting the fuel supply pipe with the oven .the tapered end of the air mixer is inserted in the outer end of the passage 27, said tapered mixer forming a gas tight engagement with saidpassage. f

- When it is desired to heat the oven the main door is opened and the supplemental door 21 is dropped down in front of the open end of the oven after which the ai;` mixer on the en d of the fuel suppl pipe is passed under this door and inserte into the DGSSES. f

outer end of the burner and the gas turned o n and lighted. When the oven has become suiiciently heated the gas is turned oil and the air mixer and fuel pipe disconnected romthe oven, after which the main door 8 is closed and securely fastened in closed position by suitable catches 38 which are here shown and are preferably in the form of hooks 38 adapted to engage keepers on the adjacent side of the oven as shown.

It will be noted that' when the oven is being heated and the vsupplemental door 2l is in an operative position a space 46 Vis provided between the upper edge of the door 2l and the top of the oven whereby any Jfumes or impure air from the burning fuel will pass out of the oven. It will also be noted that the shelves 19 are provided with series of apertures 47 through which the heat is permitted to circulate in the v oven.

From the foregoing description, taken in connection with the accompanying drawings, the construction and operation of the invention will be readily understood without requiring a more extended explanation.

Various changes in the form, proportion and the minor details ot'v construction may be resorted to without departing fromv the principle or sacrificing any of the advantages of this invention as defined and claimed.

Having thus describedmy invention, what I claim is:

In an oven of the class described, the combination with a rectangular body having .an open front, a main door hinged to said body and adapted to close the front air-tight, and 'a supplemental door slidably mounted on cleats and adapted to be housed within the oven body or withdrawn therefrom and sup.

ported in pendent position across the open front of the same, its lower edge thenbe- 'ing spaced from the bottom; of a burner located in the bottom of the oven and having a fuel passage opening toward the front of such oven, a fuel conduct-ing pipe, and a removable air mixer connected with said pipe and having a tapering end adapted to be passed under the lower edge of the pendent supplemental door and inserted into said fuelpassage, for the purpose set forth.

In testimony whereof I have hereunto set my hand in presence of two subscribing wit- HAZEL Prxnnr, Brama Barns. 

